No Midi Input/Output

msi laptop, Intel Core i5-2410M, 4GB DDR3
Windows 7 - 64Bit home Edition

using a midi controller (Korg Kaossilator Pro, on external control (works as Midi keyboard), connected with USB.
the device plugs and play, recognized by win7 and recognized by cubase, BUT does not shows any midi in signal on cubase, in the midi, I set the korg as the input. this doesn’t even effect the midi in monitor. not in the channel and not in the transport panel.
I also tried to transform midi from a vsti that generates midi. but it didn’t work either.
I tried to switch between midi driver on the device setup, but nothing worked.
there seems to be no midi communication in cubase. what to do?